LA4728

Ordering number : EN

2-Channel BTL Power Amplifier (35 W+35 W)

with Standby Switch for Car Stereos

Preliminary

Monolithic Linear IC

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN

Overview

The LA4728 is a BTL two-channel power IC for car

audios developed in pursuit of excellent sound quality.

Low-region frequency characteristics have been improved

through the use of a new NF capacitorless circuit, and

crosstalk which causes “muddy” sound has been reduced

by improving both circuit and pattern layout. As a result

the LA4728 provides powerful bass and clear treble.

Features

⋅ High power: supports total output of 35 W+35 W. [EIAJ

⋅ Less pop noise.

⋅ Designed for excellent sound quality.

⋅ Any rise time settable by an external capacitor.

⋅ Standby switch circuit on chip. (microcontroller support-

ed)

⋅ Various protectors on chip.

short/ overvoltage/ thermal shutdown circuit)

⋅ The LA4728 is pin-compatible with the LA4725.

Specifications

Maximum Ratings at Ta = 25 ˚C

Recommended Conditions at Ta = 25 ˚C

Package Dimensions

unit: mm

3113A-SIP14HZ

[LA4728]

SANYO: SIP14HZ

Parameter

Symbol

Conditions

Ratings

Unit

Maximum supply voltage

18

V

Surge supply voltage

50

V

Maximum output current

Per channel

3.5

A

Allowable power disspation

Pd max

With arbitrarily large heat sink

32

W

Operating temperature

Topr

–35 to +85

˚C

Storage temperature

Tstg

–40 to +150

˚C

Parameter

Symbol

Conditions

Ratings

Unit

Recommended supply voltage

13.2

V

Operating voltage range

Range where Pd max is not exceeded

9 to 16

V

Recommended load resistance

4

Ω

32497RM(KOTO) No.5716-1/3